This summer, PERL showcased its work at both the AAPT and PERC meetings in Omaha. Talks were well-received, and our papers were all accepted for publication. Codes in parantheses refer to the abstract entry in the conference program. Invited Presentations: MacKenzie R. Stetzer, “Using Experiments to Foster Conceptual Understanding: Insights from PER” (AD01) Contributed Presentations: read more Presentations at the AAPT Summer Meeting 2011 in Omaha